![Guest post by Keith Thrower: Technical factors affecting CW radio communication in WW1, part 2 - Innovating in Combat Guest post by Keith Thrower: Technical factors affecting CW radio communication in WW1, part 2 - Innovating in Combat](http://blogs.mhs.ox.ac.uk/innovatingincombat/files/2014/06/Marconi-Short-distace-radio.jpg)
Guest post by Keith Thrower: Technical factors affecting CW radio communication in WW1, part 2 - Innovating in Combat
![File:US Navy Radio Compass Receiver Model SE-1012, 1918 - New England Wireless & Steam Museum - East Greenwich, RI - DSC06688.jpg - Wikimedia Commons File:US Navy Radio Compass Receiver Model SE-1012, 1918 - New England Wireless & Steam Museum - East Greenwich, RI - DSC06688.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/8/89/US_Navy_Radio_Compass_Receiver_Model_SE-1012%2C_1918_-_New_England_Wireless_%26_Steam_Museum_-_East_Greenwich%2C_RI_-_DSC06688.jpg)
File:US Navy Radio Compass Receiver Model SE-1012, 1918 - New England Wireless & Steam Museum - East Greenwich, RI - DSC06688.jpg - Wikimedia Commons
![broadcast, radio, radio set TelefunkenType 85 c, Germany, 1917 / 1918, Additional-Rights-Clearences-Not Available Stock Photo - Alamy broadcast, radio, radio set TelefunkenType 85 c, Germany, 1917 / 1918, Additional-Rights-Clearences-Not Available Stock Photo - Alamy](https://c8.alamy.com/comp/BXM00E/broadcast-radio-radio-set-telefunkentype-85-c-germany-1917-1918-additional-BXM00E.jpg)
broadcast, radio, radio set TelefunkenType 85 c, Germany, 1917 / 1918, Additional-Rights-Clearences-Not Available Stock Photo - Alamy
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2 T26 F1 1918 Students Trained as Radio Operators 1918 Technology Radio Communication USA students are trained as radio operator Stock Photo - Alamy
![Chut, J'ecoute: The U.S. Army's Use of Radio Intelligence in World War I – The Campaign for the National Museum of the United States Army Chut, J'ecoute: The U.S. Army's Use of Radio Intelligence in World War I – The Campaign for the National Museum of the United States Army](https://armyhistory.org/wp-content/uploads/2018/06/int_4-e1530195126957.jpg)
Chut, J'ecoute: The U.S. Army's Use of Radio Intelligence in World War I – The Campaign for the National Museum of the United States Army
![Edwin Howard Armstrong (December 18, 1890 – January 31, 1954) was an American electrical engineer and inventor. He has been called 'the most prolific and influential inventor in radio history'. He invented Edwin Howard Armstrong (December 18, 1890 – January 31, 1954) was an American electrical engineer and inventor. He has been called 'the most prolific and influential inventor in radio history'. He invented](https://c8.alamy.com/comp/2B02PKK/edwin-howard-armstrong-december-18-1890-january-31-1954-was-an-american-electrical-engineer-and-inventor-he-has-been-called-the-most-prolific-and-influential-inventor-in-radio-history-he-invented-the-regenerative-circuit-while-he-was-an-undergraduate-and-patented-it-in-1914-followed-by-the-super-regenerative-circuit-in-1922-and-the-superheterodyne-receiver-in-1918-armstrong-was-also-the-inventor-of-modern-frequency-modulation-fm-radio-transmission-armstrong-was-born-in-new-york-city-new-york-in-1890-he-studied-at-columbia-university-he-later-became-a-professor-at-columbia-2B02PKK.jpg)